Metal component collection agent and method for collecting metal component

Abstract

The present invention provides a metal component collection agent for collecting one or more metal components from a metal component-containing material; the agent containing, as an active ingredient, a compound containing one or more group 2 elements of the periodic table, or a compound containing one or more lanthanoid elements. The present invention further provides a method for collecting one or more metal components from a metal component-containing material; the method comprising heating the metal component-containing material and the metal component collection agent in such a manner that a metal vapor or metal oxide vapor produced by heating the metal component-containing material is brought into contact with the metal component collection agent. According to the present invention, metal components can be easily and efficiently collected from materials containing highly useful metal components such as noble or rare metal.

The invention claimed is: 
     
       1. A method for collecting one or more metal components from a metal component-containing material, the method comprising
 heating the metal component-containing material and a metal component collection agent in such a manner that a metal vapor or metal oxide vapor produced by heating the metal component-containing material is brought into contact with the metal component collection agent, 
 wherein the metal component collection agent comprises as an active ingredient a compound containing one or more group 2 elements of the periodic table, or a compound containing one or more lanthanoid elements. 
 
     
     
       2. The method according to  claim 1 , wherein the metal component-containing material and the metal component collection agent are placed together in one container and heated. 
     
     
       3. The method according to  claim 1 , wherein the metal component-containing material is a waste material containing at least one metal element selected from the group consisting of noble metal elements and rare metal elements,
 wherein the waste material is at least one material selected from the group consisting of waste catalysts for purifying automobile exhaust gas, waste catalysts for chemical industries, waste gas sensor boards, wastes generated in electronic circuit board manufacturing processes, waste electronic components, wastes of electrolysis electrodes and, wastes generated from medical products; 
 wherein the noble metal elements and rare metal elements are metal elements in groups 6, 7, 8, 9 and 13 of the periodic table. 
 
     
     
       4. A method for recovering metal, comprising:
 collecting one or more metal components using the method of  claim 1 ; 
 dissolving the collected one or more metal elements in an acid; and 
 then recovering the dissolved one or more metal elements as a solid metal.